CN110702039B - Device for measuring wind deflection angle of suspension insulator string - Google Patents
Device for measuring wind deflection angle of suspension insulator string Download PDFInfo
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- CN110702039B CN110702039B CN201911004289.3A CN201911004289A CN110702039B CN 110702039 B CN110702039 B CN 110702039B CN 201911004289 A CN201911004289 A CN 201911004289A CN 110702039 B CN110702039 B CN 110702039B
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- connecting rod
- insulator string
- encoder
- belt wheel
- suspension insulator
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
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- General Physics & Mathematics (AREA)
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- A Measuring Device Byusing Mechanical Method (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
The invention discloses a device for measuring the windage yaw angle of a suspension insulator string, which comprises an encoder, a mechanical transmission device and a connecting rod assembly, wherein one end of the connecting rod assembly is clamped with the upper end of the suspension insulator string arranged on a cross arm, the other end of the connecting rod assembly is connected with the mechanical transmission device, the connecting rod assembly is connected with the encoder through the mechanical transmission device, the mechanical transmission device and the encoder are both fixed on the cross arm, the suspension insulator string swinging along the direction of a lead is connected to drive the connecting rod assembly, and the swinging amount of the connecting rod assembly is transmitted to the encoder through the mechanical. The method is convenient and practical, the wind deflection angle of the suspension insulator string can be measured without disassembling the insulator string, and the problem that the wind deflection angle of the insulator string of the current transmission line is difficult to measure is solved.
Description
Technical Field
The invention relates to the technical field of power transmission line devices, in particular to a device for measuring a wind deflection angle of a suspension insulator string.
Background
With the rapid development of power grid construction, line corridors are increasingly tense, and the phenomenon of windage yaw flashover is more and more serious due to the increasing number of power transmission lines passing through complex terrains and regions with severe weather conditions. The insulator string and the lead of the overhead transmission line deviate from the vertical position under the action of a large wind load to form a wind deflection angle, and the wind deflection angle swings out of plane. The success rate of reclosing after the wind deflection of the power transmission line is tripped is low, the normal operation of a power grid system is seriously influenced and threatened, and huge economic loss and social influence are caused.
In order to effectively ensure the safe and stable operation of the power transmission line, the measurement of the wind deflection angle of the insulator string of the power transmission line is the primary work of the design of preventing and controlling the wind deflection of the power transmission line. For a long time, the windage yaw is usually detected at home and abroad by using a method of assisting manual observation by using a high-speed camera, and the method has great limitation due to objective environment; in addition, a wind deflection measuring instrument is used for measuring the wind deflection angle of the insulator string, the insulator string needs to be disassembled firstly, and then the measuring instrument is installed between the insulator string and the cross arm, so that the method is very inconvenient for the running power transmission line. Based on the wind deflection angle measuring device, the invention provides a wind deflection angle measuring device for a suspension insulator string, necessary data are provided for the wind deflection prevention design of a power transmission line, and the safe and stable operation of the power transmission line is effectively guaranteed.
Disclosure of Invention
The invention aims to solve the technical problem of providing a device for measuring the windage yaw angle of a suspension insulator string, which is convenient and practical, can measure the windage yaw angle of the suspension insulator string without disassembling the insulator string, and solves the problem that the current measurement of the windage yaw angle of the insulator string of a power transmission line is difficult.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a device for measuring the windage yaw angle of a suspension insulator string is characterized by comprising an encoder, a mechanical transmission device and a connecting rod assembly, wherein one end of the connecting rod assembly is clamped with the upper end of the suspension insulator string arranged on a cross arm, the other end of the connecting rod assembly is connected with the mechanical transmission device, the connecting rod assembly is connected with the encoder through the mechanical transmission device, the mechanical transmission device and the encoder are both fixed on the cross arm, the suspension insulator string swinging along the direction of a lead drives the connecting rod assembly, and the swinging amount of the connecting rod assembly is transmitted to the encoder through the mechanical transmission device; the connecting rod assembly comprises a first connecting rod and a second connecting rod, the first connecting rod and the second connecting rod are hinged to each other, a through groove is formed in the hinged end of the first connecting rod and the hinged end of the second connecting rod, the first connecting rod and the second connecting rod penetrate through the through groove through bolts to be hinged to each other, the other end of the second connecting rod is connected with the upper end of the suspension insulator string mandrel through a U-shaped metal clamp, and the other end of the first connecting rod is connected with the normal direction of the mechanical transmission device.
The scheme is further optimized, the mechanical transmission device comprises a small belt wheel, a large belt wheel and a synchronous belt, a rotating shaft of the small belt wheel is connected with an encoder through a coupler, and the encoder is supported by a first bearing; the rotating shaft of the large belt wheel is supported through two second bearings, the bearings are fixed on a cross arm close to the suspension insulator string, and the large belt wheel transmits a rotating angle to the small belt wheel through a synchronous belt.
The scheme is further preferably selected, the first connecting rod is connected with the large belt wheel through a T-shaped clamping plate, and the T-shaped clamping plate is fixed at the edge, close to the large belt wheel.
Preferably, the encoder is fixed at the end of the cross arm near the iron tower, is connected with the ground signal acquisition device through a transmission optical cable, performs analog-to-digital conversion, and records data.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:
(1) the U-shaped metal clamp is connected with the upper end of the core rod of the suspension insulator string, so that the windage yaw movement of the suspension insulator string is transmitted to the large belt wheel, the windage yaw angle can be measured without disassembling the insulator string, and the device is convenient and practical;
(2) the two connecting rods are connected by the bolts penetrating through the through grooves, and the allowance of lateral swing of the suspension insulator string is reserved, so that the acting force of the suspension insulator string in the direction of a lead generated under the action of wind load can be eliminated, and the measuring device is more durable;
(3) through the transmission of the synchronous belt, the windage yaw motion can be accurately transmitted, the length of the synchronous belt can be adjusted according to the size of the cross arm of the iron tower, and the installation position of the encoder is determined, so that the device is reasonable in installation and convenient to use;
(4) by using the encoder, the wind deflection angle can be converted into a digital signal, so that the post-processing of the measurement work is more convenient;
(5) the invention has the advantages of convenience, durability, convenient operation and the like, has very important engineering practical value and provides important guarantee for the safe operation of the power transmission line.
Drawings
FIG. 1 is a front view of the present measuring device;
FIG. 2 is a left side view of the present measuring device;
FIG. 3 is a schematic view of the assembly of the measuring device;
FIG. 4 is a schematic view of the connection of the present measuring device in use;
in the figure: 1. an encoder; 2. a coupling; 3-1, a first bearing; 3-2, a second bearing; 4-1, a small belt pulley; 4-2, a large belt wheel; 5. a synchronous belt; 6. a rotating shaft; 7. a connecting rod assembly; 7-1, a through groove; 7-2, bolts; 7-3, T-shaped splints; 7-4, a first connecting rod; 7-5, a second connecting rod; 8. a U-shaped metal card; 9. the insulator string is suspended.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments, which are illustrative only and not limiting, and the scope of the present invention is not limited thereby.
As shown in fig. 1 and 4, the embodiment discloses a device for measuring windage yaw angle of a suspension insulator string, which comprises an encoder 1, a mechanical transmission device and a connecting rod assembly 7, wherein one end of the connecting rod assembly 7 is clamped with the upper end of a suspension insulator string 9 arranged on a cross arm, the other end of the connecting rod assembly 7 is connected with the mechanical transmission device, the connecting rod assembly 7 is connected with the encoder 1 through the mechanical transmission device, and the mechanical transmission device and the encoder 1 are both fixed on the cross arm. The mechanical transmission device can adopt belt transmission or gear transmission to transmit the power of the connecting rod assembly 7 to the encoder 1.
The suspension insulator string 9 swings along the direction of a lead to drive the connecting rod assembly 7, the swinging amount of the connecting rod assembly 7 is transmitted to the encoder 1 through the mechanical transmission device, the encoder 1 is fixed at the end of the cross arm close to the iron tower and is connected with the ground signal acquisition device through the transmission optical cable to perform analog-to-digital conversion, data are recorded, and measurement of the suspension insulator string 9 is achieved. The encoder 1 adopts a photoelectric rotary encoder, and mechanical quantities such as angular displacement and angular velocity of an output shaft can be converted into corresponding electric pulses through photoelectric conversion to be output as digital quantities. The ground signal acquisition device is an existing complete set of digital display acquisition device.
On the basis of the above embodiment, the connecting rod assembly 7 is further limited, as shown in fig. 3, the connecting rod assembly 7 includes two connecting rods, namely a first connecting rod 7-4 and a second connecting rod 7-5, the first connecting rod 7-4 and the second connecting rod 7-5 are hinged to each other, the hinged ends of the first connecting rod 7-4 and the second connecting rod 7-5 are provided with through grooves 7-1, the two connecting rods are hinged together by penetrating through the through grooves 7-1 through bolts 7-2, the other end of the second connecting rod 7-5 is connected with the upper end of a mandrel of a suspension insulator string 9 through a U-shaped metal clip 8, the suspension insulator string 9 is suspended on a cross arm of an iron tower, the other end of the first connecting rod 7-4 is connected with a mechanical transmission device, and the mechanical transmission device is driven to transmit the driving force caused by the swinging of the.
When the external wind speed is high, the wind load drives the suspension insulator string 9 to swing, and the swing angle of the suspension insulator string 9 towards the iron tower is the angle required by the wind deflection design, so that accurate measurement is required. The acting force generated by the suspension insulator string 9 swinging along the wire direction influences the accuracy of wind deflection angle measurement, and in the embodiment, the wind deflection angle can be accurately measured by eliminating the sliding of the connecting rod assembly 7 on the through groove 7-1.
On the basis of the above embodiment, the mechanical transmission device is further limited, as shown in fig. 2, the mechanical transmission device comprises a small belt wheel 4-1, a large belt wheel 4-2 and a synchronous belt 5, a rotating shaft of the small belt wheel 4-1 is connected with an encoder 1 through a coupling 2, and the encoder 1 supports the small belt wheel 4-1 through a first bearing 3-1; a rotating shaft 6 of the large belt wheel 4-2 is supported by two second bearings 3-2, the bearings 3-2 are fixed on a cross arm close to a suspension insulator string 9, the large belt wheel 4-2 transmits a rotating angle to the small belt wheel 4-1 through a synchronous belt 5, and the length of the synchronous belt 5 can be adjusted according to the specific situation of the cross arm on site to ensure accurate transmission of windage yaw movement; the first connecting rod 7-4 is connected with the large belt wheel 4-2 through a T-shaped clamping plate 7-3, and the T-shaped clamping plate 7-3 is fixed at the edge of the large belt wheel 4-2.
The swing angle of the suspension insulator string 9 towards the iron tower direction is transmitted to a large belt wheel 4-2 through a connecting rod assembly 7 by a first connecting rod 7-4 through a T-shaped clamping plate 7-3, the large belt wheel 4-2 is transmitted to a small belt wheel 4-1 through a synchronous belt 5, the small belt wheel 4-1 is transmitted to an encoder 1 through a coupler 2, and the encoder 1 transmits the windage yaw angle to a ground signal acquisition device through a transmission optical cable for analog-to-digital conversion and recording of corresponding data.
When the measuring device is used in practice, the suspension insulator string does not need to be disassembled, the U-shaped metal clamp 8 is connected to the upper end of a mandrel of a suspension insulator string 9, and the device is fixed on a cross arm through the matching of the first bearing 3-1 and the second bearing 3-2 with the bearing seat.
The relationship between the windage yaw angle of the suspension insulator string 9 and the acquisition angle of the encoder 1 can be determined by the following method: knowing that the distance between the fixed position of the T-shaped clamping plate 7-3 and the circle center of the large belt wheel 4-2 is a, the distance between the suspension point at the upper end of the suspension insulator string 9 and the U-shaped metal card 8 is b, and the wind deflection angle is recorded as theta, the rotating angle of the large belt wheel is beta, then the conversion formula is as follows:
after the encoder 1 measures the angle beta, the wind deflection angle theta of the suspension insulator string 9 can be obtained through conversion of the formula, and then the wind deflection angle measurement is completed.
This measuring device can the accurate measurement insulator chain windage yaw angle that dangles, also can eliminate the effort that dangles insulator chain and produce when swinging along the wire direction to do not need dismantle insulator chain alright measure, have advantages such as convenient and practical, prevent wind for transmission line and partially design and provide effective data, guaranteed transmission line's safe operation.
Although the embodiments of the present invention and the accompanying drawings are disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit and principles of the invention and the appended claims, and therefore the scope of the invention is not limited to the embodiments and drawings disclosed.
Claims (2)
1. The device for measuring the windage yaw angle of the suspension insulator string is characterized by comprising an encoder (1), a mechanical transmission device and a connecting rod assembly (7), wherein one end of the connecting rod assembly (7) is clamped with the upper end of the suspension insulator string (9) arranged on a cross arm, the other end of the connecting rod assembly (7) is connected with the mechanical transmission device, the connecting rod assembly (7) is connected with the encoder (1) through the mechanical transmission device, the mechanical transmission device and the encoder (1) are fixed on the cross arm, the suspension insulator string (9) swinging along the wire direction drives the connecting rod assembly (7) to swing, and the swinging amount of the connecting rod assembly (7) is transmitted to the encoder (1) through the mechanical transmission device; the connecting rod assembly (7) comprises a first connecting rod (7-4) and a second connecting rod (7-5), the first connecting rod (7-4) and the second connecting rod (7-5) are hinged to each other, a through groove (7-1) is formed in the hinged end of the first connecting rod (7-4) and the hinged end of the second connecting rod (7-5), the two connecting rods are hinged to each other by penetrating a bolt (7-2) through the through groove (7-1), the other end of the second connecting rod (7-5) is connected with the upper end of a suspension string insulator (9) mandrel through a U-shaped metal clamp (8), and the other end of the first connecting rod (7-4) is connected with the normal direction of the mechanical transmission device;
the mechanical transmission device comprises a small belt wheel (4-1), a large belt wheel (4-2) and a synchronous belt (5), a rotating shaft of the small belt wheel (4-1) is connected with an encoder (1) through a coupler (2), and the encoder (1) supports the small belt wheel (4-1) through a first bearing (3-1); a rotating shaft (6) of the large belt wheel (4-2) is supported by two second bearings (3-2), the second bearings (3-2) are fixed on a cross arm close to a suspension insulator string (9), and the large belt wheel (4-2) transmits a rotating angle to the small belt wheel (4-1) through a synchronous belt (5);
the first connecting rod (7-4) is connected with the large belt wheel (4-2) through a T-shaped clamping plate (7-3), and the T-shaped clamping plate (7-3) is fixed at the edge, close to the large belt wheel (4-2);
during measurement, the device is connected to the upper end of a mandrel of a suspension insulator string (9) through a U-shaped metal clamp (8), the device is fixed on a cross arm through a first bearing (3-1) and a second bearing (3-2) matched with a bearing seat, the distance between the fixed position of a T-shaped clamping plate (7-3) and the center of a large belt wheel (4-2) is known to be a, the distance between a suspension point at the upper end of the suspension insulator string (9) and the U-shaped metal clamp (8) is known to be b, the wind deflection angle is recorded to be theta, the large belt wheel rotates by an angle beta, the angle beta can be measured through an encoder (1), and therefore the wind deflection angle theta of the suspension insulator string (9) can be obtained through the following formula of theta = a multiplied by beta/b.
2. The device for measuring the windage yaw angle of the suspension insulator string as claimed in claim 1, wherein the encoder (1) is fixed at the end of the cross arm close to the iron tower, is connected with a ground signal acquisition device through a transmission optical cable, performs analog-to-digital conversion, and records data.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911004289.3A CN110702039B (en) | 2019-10-22 | 2019-10-22 | Device for measuring wind deflection angle of suspension insulator string |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911004289.3A CN110702039B (en) | 2019-10-22 | 2019-10-22 | Device for measuring wind deflection angle of suspension insulator string |
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| CN110702039A CN110702039A (en) | 2020-01-17 |
| CN110702039B true CN110702039B (en) | 2021-06-01 |
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| CN112484665B (en) * | 2020-10-13 | 2022-11-22 | 深圳供电局有限公司 | Insulator deflection angle measuring method, device and system |
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